06Ni7DR Steel Plate for Ultra-Low Temperature Pressure Vessels (GB/T 713.4-2023)

06Ni7DR is a 7% nickel-alloy steel plate grade for ultra-low temperature pressure vessels under the Chinese national standard. The manufacturing specification is GB/T 713.4-2023 (previous version: GB/T 24510-2017), and the ultrasonic testing standard is NB/T 47013.3-2015.

This grade is specifically designed for use down to -196°C (liquid nitrogen temperature), with mandatory Charpy V-notch impact testing at -196°C (≥80 J). It is a newly added grade in GB/T 713.4-2023.

06Ni7DR is widely used in LNG storage tanks, cryogenic vessels, and equipment for liquefied gas. It offers an excellent balance of ultra-low temperature toughness and cost compared with 9% Ni steel.

06Ni7DR designation explanation: 06 represents average carbon content (0.06%), Ni7 denotes average nickel content of 7%, DR stands for Low-temperature ("低") Pressure Vessel ("容").

Yield Strength

≥560 MPa

Tensile Strength

680–820 MPa

Impact (-196°C)

≥80 J

Standard

GB/T 713.4-2023

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Product Overview

06Ni7DR Steel Plate is a 7% nickel-alloy pressure vessel steel manufactured in accordance with GB/T 713.4. It is specifically designed for ultra-low temperature service down to -196°C, where reliable impact toughness and structural safety are critical.

As a newly added grade in GB/T 713.4-2023, 06Ni7DR offers an excellent balance of ultra-low temperature toughness and cost compared with 9% Ni steel (06Ni9DR), making it suitable for LNG and liquefied gas applications.

Yield 560MPa 7% Ni alloy Q+T delivery -196°C impact

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Core Advantages

Guaranteed -196°C impact toughness (≥80 J)
7% Ni alloy for excellent cryogenic toughness
Quenched + tempered or Q+Q+T delivery
Side expansion value ≥0.64mm measured
Shot blasting · Residual magnetism ≤50 gauss

Professional Technical Support & Customization

Comprehensive Knowledge Base: Our sales team is proficient in nickel-alloy cryogenic steel standards. Whether it's the Chinese national standard 06Ni7DR, or related grades such as 08Ni3DR, 07Ni5DR, and 06Ni9DR, we can provide accurate technical communication.

Zero Communication Errors: With solid product knowledge, we can avoid all basic errors during the order technical condition confirmation stage, ensuring the accuracy of your order.

Flexible Customization Capabilities: If your design has special requirements (e.g., drop-weight test (NDT), thickness direction properties (Z-direction), simulated post-weld heat treatment, UT grade, residual magnetism control), we support customized production.

Q+T ≈35 days

Q+Q+T ≈40 days

Max thickness 80mm

📋 Applications

LNG storage tanks

Liquefied gas vessels

Cryogenic heat exchangers

LNG transport ships

Ethylene storage tanks

Pressure shells & heads

📦 Stock Resources

Q+T plates: 5–50mm (W:2000–2500, L:11000–12500)

Q+Q+T plates: 30–80mm (W:2000–2500, L:11000–12500)

Custom rolling: up to 80mm

Click to check 06Ni7DR inventory

Spot stock size range and supply conditions

Quenched + Tempered (Q+T)

Thickness (mm)	Width (mm)	Length (mm)
5–50	2000/2200/2500	11000–12500

Quenched + Quenched + Tempered (Q+Q+T)

Thickness (mm)	Width (mm)	Length (mm)
30–80	2000/2200/2500	11000–12500

Supply Condition: Q+T, Q+Q+T (per GB/T 713.4-2023)

06Ni7DR Chemical Composition (max %)

C	Si	Mn	Ni	P	S	Cr	Cu	Mo	V	Nb	Alt
≤0.08	0.05–0.30	0.30–0.80	6.50–7.50	≤0.008	≤0.003	≤0.50	≤0.35	≤0.30	≤0.01	≤0.03	≥0.015

Note: 除06Ni7DR牌号外，Cr+Mo+Cu≤0.50%。06Ni7DR不受此限制。当采用酸溶铝(Als)代替Alt时，Als含量应不小于0.015%。

06Ni7DR · alloying elements & roles

per GB/T 713.4

C Carbon ≤0.08%

Very low carbon for excellent cryogenic toughness and weldability.

Si Silicon 0.05–0.30%

Deoxidizer; kept low for toughness.

Mn Manganese 0.30–0.80%

Contributes to strength and toughness; kept moderate for cryogenic ductility.

Ni Nickel 6.50–7.50%

Key alloying element; provides excellent -196°C toughness.

P Phosphorus ≤0.008%

Extremely tight limit; harmful to cryogenic toughness.

S Sulfur ≤0.003%

Very tight limit; harmful to toughness and weldability.

Cr Chromium ≤0.50%

Residual element; contributes to hardenability.

Cu Copper ≤0.35%

Residual element; limited to avoid adverse effects.

Mo Molybdenum ≤0.30%

Residual element; improves hardenability.

V Vanadium ≤0.01%

Residual element; tightly controlled.

Nb Niobium ≤0.03%

Residual element; tightly controlled.

Alt Aluminum (total) ≥0.015%

Deoxidizer, refines grain structure. Als ≥0.015% if used instead.

06Ni7DR typical ranges (wt%): C ≤0.08, Si 0.05–0.30, Mn 0.30–0.80, Ni 6.50–7.50, P ≤0.008, S ≤0.003, Cr ≤0.50, Cu ≤0.35, Mo ≤0.30, V ≤0.01, Nb ≤0.03, Alt ≥0.015.

06Ni7DR Mechanical Properties & Impact Test

Thickness (mm)	YS (MPa)	TS (MPa)	Elong (%)	Impact -196°C (J)
5–30	≥560	680–820	≥18	≥80
>30–50	≥550	680–820	≥18	≥80
>50–80	≥540	680–820	≥18	≥80

Note: 06Ni7DR is delivered in quenched + tempered (Q+T) or quenched + quenched + tempered (Q+Q+T) condition. Impact test at -196°C is mandatory per GB/T 713.4-2023. Bending test: D=3a (transverse). Side expansion value ≥0.64mm shall be measured for impact specimens.

Cryogenic Impact & Special Inspection Requirements

Test Temperature

-196 °C

Average Impact Energy

≥80 J

Side Expansion

≥0.64 mm

Residual Magnetism

≤50 Gauss

📋 06Ni7DR plates undergo shot blasting after heat treatment to remove surface scale. Residual magnetism is measured on every plate before delivery. Drop-weight test (NDT) and Z-direction properties are available upon agreement. UT per NB/T 47013.3, grade not lower than I.

06Ni7DR vs Related Nickel-Alloy Cryogenic Grades

Item	08Ni3DR	07Ni5DR	06Ni7DR	06Ni9DR
Standard	GB/T 713.4	GB/T 713.4	GB/T 713.4	GB/T 713.4
Ni content	3.25–3.75%	4.75–5.25%	6.50–7.50%	8.50–10.00%
Min use temp	-100°C	-120°C	-196°C	-196°C
Min yield (MPa)	≥320	≥370	≥560	≥560
Impact energy	≥60 J (-100°C)	≥60 J (-120°C)	≥80 J (-196°C)	≥80 J (-196°C)
Delivery	N / N+T	Q+T	Q+T / Q+Q+T	Q+T / Q+Q+T

International equivalents (per GB/T 713.4-2023 Appendix A): 06Ni7DR corresponds to EN 10028-4 X6Ni7, ISO 9328-4 X6Ni7, JIS G 3127 SL7N590, ASTM A553 7% Ni. 06Ni9DR corresponds to EN 10028-4 X7Ni9/X8Ni9, ASTM A553 9% Ni.

Scenario-Based Recommendation · GB Grade Comparison

16MnDR

Cryogenic tanks, cold regions, LPG

Yield ≥315 MPa · Tensile 490-620 MPa
Charpy -40°C ≥47J

vs 06Ni7DR: lower strength & no -196°C capability

16MnDR details

09MnNiDR

Ethylene, chemical, extreme‑cold equipment

Yield ≥300 MPa · Tensile 440-570 MPa
Charpy -70°C (Ni alloyed)

vs 06Ni7DR: 09MnNiDR stops at -70°C, 06Ni7DR reaches -196°C

09MnNiDR details

08Ni3DR

3.5% Ni steel for -100°C service

Yield ≥320 MPa · Tensile 490-620 MPa
Charpy -100°C ≥60J

vs 06Ni7DR: lower Ni content and higher temp limit

08Ni3DR details

06Ni7DR

LNG, liquefied gas, -196°C

Yield ≥560 MPa · Tensile 680-820 MPa
Charpy -196°C ≥80J

Newly added grade; excellent balance of toughness and cost

Current Grade

06Ni9DR

LNG, 9% Ni steel, -196°C

Yield ≥560 MPa · Tensile 680-820 MPa
Charpy -196°C ≥80J

vs 06Ni7DR: higher Ni content, similar strength; higher cost

06Ni9DR details

Quick selection path: 16MnDR (-40°C) → 09MnNiDR (-70°C) → 08Ni3DR (-100°C) → 07Ni5DR (-120°C) → 06Ni7DR / 06Ni9DR (-196°C)

Quality Control & Inspection

Mill Test Certificate 3.1 Chemical analysis Mechanical testing Charpy V-notch -196°C Side expansion measurement Residual magnetism test UT per NB/T 47013.3 Third-party inspection

📐 Customizable Specification Range for 06Ni7DR

Thickness

5–80 mm

(per standard; custom rolling available)

Width

1500–5200 mm

(adjustable per order)

Length

≤ 18000 mm

(max. single length)

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Delivery Condition

Q+T Q+Q+T

Q+T quenched + tempered · Q+Q+T quenched + quenched + tempered. Per GB/T 713.4-2023, 06Ni7DR is delivered in Q+T or Q+Q+T condition.

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Additional Requirements

Drop-weight test (NDT) per GB/T 6803
Thickness direction (Z-direction) properties
Simulated post‑weld heat treatment (PWHT)
UT per NB/T 47013.3, grade I or higher
Residual magnetism control ≤50 gauss

📋 Other customized technical conditions are also negotiable.

✅ The above ranges represent our standard customizing capability — dimensions, delivery conditions, and supplementary tests can be further adjusted to meet your project specifications.

Frequently Asked Questions

What is 06Ni7DR steel plate used for?

06Ni7DR steel plate is mainly used for LNG storage tanks, liquefied gas vessels, cryogenic heat exchangers, LNG transport ships, and other equipment operating down to -196°C, manufactured according to GB/T 713.4.

What is the difference between 06Ni7DR and 06Ni9DR?

06Ni7DR contains 6.5–7.5% Ni while 06Ni9DR contains 8.5–10% Ni. Both are qualified for -196°C service with similar strength (YS ≥560 MPa, TS 680–820 MPa) and impact energy (≥80J). 06Ni7DR is a newly added grade in GB/T 713.4-2023 and offers better cost efficiency.

Why is residual magnetism controlled in 06Ni7DR?

06Ni7DR is a ferromagnetic nickel-alloy steel. Excessive residual magnetism can affect welding quality and arc stability. Per GB/T 713.4-2023, residual magnetism must not exceed 50 gauss. Plates should not be lifted with electromagnets or stored near high-voltage equipment.

Does 06Ni7DR require shot blasting?

Yes. Per GB/T 713.4-2023, 06Ni7DR and 06Ni9DR plates shall be shot-blasted after heat treatment to remove surface oxide scale.

Can you provide 06Ni7DR steel plates with custom sizes?

Yes. Custom rolling for thickness 5–80mm, width up to 5200mm, length up to 18000mm. Delivery: approximately 35 days Q+T, 40 days Q+Q+T.

Request a Quote

Emails go directly to customize@cehesteel.com — reply within 12h.